# US 12,113,218 B2 · Lithium-ion battery negative electrode active material, lithium-ion battery negative electrode, lithium ion battery, battery pack and battery-powered vehicle

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- Number: US 12,113,218 B2
- Document ID: US12113218B2
- Status: Granted
- Kind: B2
- Application number: 17/284,276
- Filed: 2019-09-25
- Published: 2021-12-16
- Granted: 2024-10-08
- Earliest claimed: 2018-10-10
- Assignees: Hunan Jinye High-tech Co., Ltd.
- Applicants: Hunan Jinye High-tech Co., Ltd.
- Inventors: Jianrong Shao; Qiang Sun; Hongdong Wang; Junxiang Zhang; Liufeng Zhang; Jie Tang
- Web page: https://patentgrep.com/patent/US12113218B2

## CPC

- C01B 32/15: Nano-sized carbon materials
- H01M 4/583: Carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/133: Electrodes based on carbonaceous material, e.g. graphite-intercalation compounds or CFx
- H01M 4/587: for inserting or intercalating light metals
- H01M 4/623: {fluorinated polymers}
- H01M 4/625: {Carbon or graphite}
- H01M 10/0525: Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
- B82Y 30/00: Nanotechnology for materials or surface science, e.g. nanocomposites
- B82Y 40/00: Manufacture or treatment of nanostructures
- H01M 2004/021: {Physical characteristics, e.g. porosity, surface area}
- H01M 2004/027: {Negative electrodes}
- Y02E 60/10: Energy storage using batteries
- Y02P 70/50: Manufacturing or production processes characterised by the final manufactured product
- C01B: NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; {METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C}
- H01M: PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- B82Y: SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
- Y02E: REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02P: CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS

## Abstract

The present invention relates to negative electrode carbon materials for lithium-ion batteries, and particularly to a lithium-ion battery negative electrode active material, a lithium-ion battery negative electrode, a lithium-ion battery, a battery pack and a battery-powered vehicle. In a pore structure, measured by N2 adsorption and desorption, of the lithium-ion battery negative electrode carbon particles, by using the total pore volume measured by BJH having a pore size of 2-200 nm as the reference, the sum of the volumes of pores with a pore size of 2-10 nm is 2-10%, the sum of the volumes of pores with a pore size of 10-100 nm is 30-65%, and the sum of the volumes of pores with a pore size of 100-200 nm is 30-65%, and the carbon particles have a BET specific surface area of 0.9-1.9 m2/g.

## Claims

### Claim 1

A lithium-ion battery anode carbon particulate, wherein in pore structure measured by N2 adsorption and desorption of the carbon particulate, the ratio of the total pore volumes of the pore diameters of 2-10 nm is 5-10%, the ratio of the total pore volumes of the pore diameters of 10-100 nm is 50-65%, and the ratio of the total pore volumes of the pore diameters of 100-200 nm is 30-40%, based on the total pore volume measured by BJH of the pore diameters of 2-200 nm; the carbon particulate has a BET specific surface area within a range of 1-4 m2/g,
wherein the carbon particulate has an interlayer spacing d(002) measured by X-ray diffraction being 0.3368 nm or less, a crystallite size Lc in a C-axis direction within a range of 0.5-0.9 nm, and a graphitization degree of 84-93%.

### Claim 2 (depends on 1)

The lithium-ion battery anode carbon particulate of claim 1, wherein the carbon particulate has a D peak measured by Raman within a range of 1,300-1,400 cm−1, and a G peak within a range of 1,550-1,600 cm−1; ID/IG<0.1.

### Claim 3 (depends on 1)

The lithium-ion battery anode carbon particulate of claim 1, wherein the carbon particulate has a granularity distribution D10within a range of 1-5 μm, D50 within a range of 12-18 μm, and D90 within a range of 25-35 μm.

### Claim 4 (depends on 3)

The lithium-ion battery anode carbon particulate of claim 3, wherein the carbon particulate has a maximum particle diameter of 39 μm.

### Claim 5 (depends on 1)

The lithium-ion battery anode carbon particulate of claim 1, wherein the carbon particulate has a mass loss of 80-90 wt % under the temperature 400-650° C. when subjecting to a thermogravimetric test.

### Claim 6 (depends on 1)

The lithium-ion battery anode carbon particulate of claim 1, wherein the carbon particulate has a tap density within a range of 0.9-1.2 g/cm3.

### Claim 7 (depends on 1)

A lithium-ion battery anode comprising the lithium-ion battery anode carbon particulate of claim 1.

### Claim 8 (depends on 7)

A lithium-ion battery comprising the lithium-ion battery anode of claim 7, a cathode and an electrolyte, wherein the cathode and the anode are separated by a separator; the cathode, the anode and the separator are immersed in the electrolyte.

### Claim 9 (depends on 7)

A lithium-ion battery anode of claim 7, wherein the lithium-ion battery anode further comprises a conductive agent, a weight ratio of the carbon particulate to the conductive agent is 1:0.05-0.125.

### Claim 10 (depends on 1)

The lithium-ion battery anode carbon particulate of claim 1, wherein the carbon particulate has a BET specific surface area within a range of 1.4-1.9 m2/g.

### Claim 11 (depends on 1)

The lithium-ion battery anode carbon particulate of claim 1, wherein the carbon particulate has a ratio of I(002)/I(100)measured by X-ray diffraction within a range of 180-300, a ratio of I(002)/I(101) within a range of 120240, a ratio of I(002)/I(004) within a range of 25-35, and a ratio of I(004)/I(110) within a range of 4-10.

### Claim 12 (depends on 11)

The lithium-ion battery anode carbon particulate of claim 11, wherein the carbon particulate has a D peak measured by Raman within a range of 1,300-1,350 cm−1, ID/IG=0.01-0.084.

### Claim 13 (depends on 12)

The lithium-ion battery anode carbon particulate of claim 12, wherein ID/IG=0.01-0.066.

### Claim 14 (depends on 9)

The lithium-ion battery anode of claim 9, wherein the lithium-ion battery anode further comprises an aqueous binder, a weight ratio of the carbon particulate to the aqueous binder is 1:0.01-0.06.

### Claim 15 (depends on 9)

The lithium-ion battery anode of claim 9, wherein the conductive agent is at least one selected from the group consisting of conductive carbon black, graphite, graphene and carbon nanotube.

### Claim 16 (depends on 14)

The lithium-ion battery anode of claim 14, wherein the aqueous binder is at least one selected from the group consisting of polyvinylidene fluoride, carboxylic butadiene-styrene latex, styrene-butadiene rubber, polyvinyl alcohol, sodium carboxymethylcellulose and polytetrafluoroethylene.